Former university Vice President Gary Schultz and former Athletic Director Tim Curley turned themselves in, according to Lt. Michael Woods, the shift commander at the Centre County Correctional Facility. Wood confirmed their surrender, but said he was not authorized to release any other details from the jail, which is about 135 miles east of Pittsburgh. The lockup is about 7 miles northeast of Penn State's main campus.
Schultz and Curley pleaded guilty to misdemeanor child endangerment in March, leading prosecutors to drop three felony charges of child endangerment and conspiracy.
Curley, 63, must serve three months in jail, while Schultz, 67, has two months behind bars. Jail officials said they will be evaluated for participation in work release while incarcerated.
Spanier continues to be a tenured faculty member and is on administrative leave. A deal with the university when he was forced out as president after Sandusky's arrest in November 2011 pays him $600,000 a year, ending this fall, after which he will receive a salary.
The three men received a complaint from a graduate assistant football coach in February 2001, who said he was highly disturbed by seeing Sandusky appear to sexually abuse the boy late on a Friday night in a team shower.
They told Sandusky not to bring children onto campus anymore, but prosecutors said the administrators had no plan to enforce that rule.
Police were not notified, and a criminal investigation into Sandusky did not begin until a Pennsylvania school district reported another complaint about him in 2008.
Sandusky was convicted in 2012 of 45 counts of child sexual abuse. He maintains his innocence and is appealing, while serving 30 to 60 years in state prison.
The scandal led the university to fire Hall of Fame football coach Joe Paterno, who was informed of the 2001 incident the next morning by the assistant, Mike McQueary. Paterno notified Curley but did not call police. He died in 2012, a few months after his firing, and was never charged with a crime.
An anonymous email in 2010 led investigators looking into Sandusky to contact McQueary, and he proved to be a critical witness at the criminal trials of both Sandusky and Spanier.
At sentencing for Curley, Schultz and Spanier last month, Judge John Boccabella did not spare Paterno, saying he "could have made that phone call without so much as getting his hands dirty. Why he didn't is beyond me."
He also questioned Curley's memory lapses while testifying for the prosecution at Spanier's trial.
"I find it really hard to believe that he doesn't remember every detail of the most serious mistake he ever made," Boccabella said.